Electric controller



Patented Mar. 13, 1923.

UNITED :STATES I CLARENCE E.AOGDE1\T, OF CINCINNATI, OHIO.

y `ELECTRIC CONTROLLER.

Application :ned May ys1,

To all whom t may concern.' o

kBe it known thatl, CLARENCE E. OGDEN, a citizen of the United States,and resident of Cincinnati, in the countyj-of Hamilton, State of Ohio,havek invented rcertain new and useful Improvements in Electricy`Controllers, of which the, following is a full, clear, and exactdescription, reference being had to the4 accompanying drawings,

forming a part of this specification.

The present invention relates to electrick controllers.

The principal object `of the lpresent invention is to provide in anelectric controller, quick movement and positive stop mechanism, wherebythe contact segments `are caused to move quicklyfrom speed to speedVKand to .assume a definite position at all times.

The slow movement of the contact `segments from speed to speed resultsin arcing between the contacts and consequent damage thereto. A similardamage results from 'A leaving the controller segments in imperfeetcontact with the controller lingers. It" is to overcome thosediiiicul'ties, that the y f drum is rotated to extreme position, asilpresent invention is principally designed. f A further objject of theinvention is to provide 1n connection `with quick movement anyconvenient position for the removal and replacement of contact plates,without the derangemen-t of said mechanism.

Other `objects of this invention will appear from the following detaileddescription thereof, taken in connection with theg accompanyingdrawings. In vthevdrawings: y

Figure 1 is a perspective ofia controller `constructed in accordancewith this invention, kthe casing being broken away to show the quickmovement and positive stop mechanism.

Figure 2 [is a similar view of a portion of the controller, the partsbein'g'in different relation. v I `j The numeral 1 indicates the casingof an electric controller in which a contact drum shaft 2 is rotatablymounted in the usual manner. Mounted on 'the shaft 2 are contactsegments 3 having replaceable Contact plates tsecured thereto by meansof screws 5 or other suitable means. The contact plates yt are arrangedto make Contact with fingers 6 in accordance with the usual con- 1919.serial No. 301,045.

struction. Rigidlymounted on ythe'shaft 2 i is a plate 7, a segment ofthe periphery of which is provided. with alternating points 8 andrecesses 9.- The outer'face of the plate is rovided with abutments orshouldersv'lO.

otatably mounted on the shaft 2' is a VThe outer endof the bushing 11 issquare as shown', and serves as a mounting fory the controller handle13. The end plate 14l of 'the casing 1 is provided on itsy inner face,

with a socket 15, Varranged to receive a steel"4 kball `16.

A compression spring 17 forces the ball 16 against the periphery of the'plate 7.

In order to adapt the plate 7 to a controller having replaceablecontactplates,therm periphery of the said plate, .oppositethe segment havin thepoints 8 and recesses 9, is provided with a surface 1,8 arranged toretain the balll in the socket whenthe lustratedvin Figure 2, fortheremovalof contact plates normally located on the bottom of the drum.

The operation of the device is as follows:

..85 The movement of the handle 13 in either direction `does not actuatethe controller i to make the next contacts, the space between theshoulders 10 on the plate 7 permitting such movement withoutcorresponding ing series of contacts in either direction is similarlyeffected, and as will be understood, this instantaneous making andbreaking of the contacts minimizes the drawing of arcs between thecontacts and thus reduces the consequent wear and injury thereto.

As will be seen, furthermore, by reason of the surface 18 on the plate7, all of the contact plates of the drum may be replaced movement of thehandle 13.y yEach succeedwithout the derangement of any of the parts ofthe quick movement and positive stop mechanism.

A ,further object achieved by the present invention is the eliminationof notches or similar devices from the casing for indicating the correctpositions of the controller handle, the positive stop in definitepositions being achieved by the plate and spring pressed ball mechanismabove described.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent, is:

l. In an electric controller in combination with a rotatable member, aplate mounted with, and arranged to actuate said member, alternatingpoints and depressions on the periphery of said plate, a member mountedadjacent said plate, means for pressing said member against theperiphery of said plate, whereby said member is caused to actuate saidplate when either ot the points on the periphery thereof is eccentricallpositioned with reference thereto, where y said rotatable member isinstan taneously rotated to and secured in definite positions, shoulderson the face of said plate,

an operating member loosely mounted in connection with said rotatablemember, a finger operable by said operating member between saidshoulders and arranged to rotate said plate eccentrically to positionthe respective points with respect to said compressed member, the spacebetween said shoulders being sufiicient to permit movement of said plateby said member independently of said operating member.

2. In an electric cont-roller in combination with av rotatable member, aplate mounted with, and arranged to actuatevsaid member, alternatingpoints and depressions on the periphery of said plate, a ball mount edadjacent said plate, means for pressing said ball against the peripheryof said plate,

whereby said ball is caused to aetuate saidv plate when either' of thepoints on the periphery thereof is eccentrically positioned withreference thereto, whereby said rotatable membcr is instantaneouslyrotated to and secured in definite positions, shoulders on the face ofsaid plate, an operatingr member loosely mounted in connection with saidrotatable member, a finger operable by said operating member betweensaid shoulders and arranged to rotate said plate eccentrically toposition the respective points with respect to said ball, the spacebetween said shoulders being sufiicient to permit movement of said plateby said ball independently of said operating member.

3. In an electric. controller, in combination with the casing, a shaftrotatably mounted in said casing, a contact drum mounted on said shaftand contact fingers mounted in the casing, a plate rigidly mounted onsaid shaft, alternating points and depressions on the periphery of saidplate, a member mounted adjacent said plate, means for pressing saidmember against the periphery of said plate, whereby said member iscaused to actuate said plate when either of the points on the peripherythere of is eceentrically positioned with reference thereto, wherebysaid drum is instantaneously rotated to and secured in definitepositions to make desired contacts, shouldeis on the face of said plate,a handle loosely mounted on said shaft, a finger operable by said handlebetween said shoulders, and arranged to. rotate said plate eccentricallyto position the respective points with respect to said compressedmember, the space between said shoulders being sufiicient to permitmovement of said plate by said member independently of said handle.

4. In an electric controller, in combination with the casing, a shaftrotatably mounted in said casing, a contact drum mounted on said shaftand contact fingers mounted in the casing, a plate rigidly mounted onsaid shaft, alternating oints and depressions on the periphery o saidplate, a ball mounted in said casing, means for pressing said ballagainst the periphery of said plate, whereby said ball is caused toactuate said plate when either of the points on the periphery thereof iseccentric-ally positioned with reference thereto, whereby said drum isinstantaneously rotated to and secured in definite positions to makedesired contacts, shoulders on the face of said plate, a handle looselymounted on said shaft, a finger operable by said han dle between saidshoulders, and arranged to rotate said plate eccentrieally to positionthe respective points with respectto said ball, t-he space between saidshoulders being suicient to permit movement of said plate by said ballindependently of said handle.

CLARENCE E. oGDEN.

